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fft2mmxb.s
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fft2mmxb.s
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; Copyright (c) <2012> <Leif Asbrink>
;
; Permission is hereby granted, free of charge, to any person
; obtaining a copy of this software and associated documentation
; files (the "Software"), to deal in the Software without restriction,
; including without limitation the rights to use, copy, modify,
; merge, publish, distribute, sublicense, and/or sell copies of
; the Software, and to permit persons to whom the Software is
; furnished to do so, subject to the following conditions:
;
; The above copyright notice and this permission notice shall be
; included in all copies or substantial portions of the Software.
;
; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
; OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
; HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
; WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
; OR OTHER DEALINGS IN THE SOFTWARE.
; This file contains radix2 loops of decimation in time
; for one and two dimensional data.
; Each loop is present in three different forms that
; differ in amplitude (gain).
section .note.GNU-stack
extern fft2_short_int
extern fft2_size
extern fft2_mmxcosin
extern fft2_na
extern fft2_m1
extern fft2_m2
extern fft2_inc
global fft2_mmx_b1hi
global fft2_mmx_b2hi
global fft2_mmx_b1med
global fft2_mmx_b2med
global fft2_mmx_b1low
global fft2_mmx_b2low
%define TMP1 ebp-4
%define TMP2 ebp-8
%define TMP3 ebp-12
%define TMP4 ebp-16
%define M1 ebp-20
%define JMAX ebp-24
%define LIMIT ebp-28
%define INCC ebp-32
%define ZXY ebp-36
%define J ebp-40
section .text
fft2_mmx_b2hi
push ebx
push ecx
push edx
push esi
push edi
push ebp
mov ebp,[fft2_mmxcosin]
xor eax,eax
mov [TMP1],eax
mov [TMP3],eax
dec eax
mov [TMP2],eax
movq mm7,[TMP2]
movq mm6,[TMP3]
; inc=fft2_inc
; Index of cosin table is loop control. 4 words for each entry.
mov eax,[fft2_inc]
sal eax,3
mov [INCC],eax
; fft2_inc/=4;
sar eax,5
mov [fft2_inc],eax
mov eax,[fft2_size]
sal eax,1
mov [LIMIT],eax
; Base of current transform.
;zxy=&fft2_short_int[2*ui.rx_channels*fft2_na*fft2_size];
mov eax,[fft2_size]
sal eax,3
imul eax,[fft2_na]
mov edx,[fft2_short_int]
add edx,eax
mov [ZXY],edx
; ia and related variables point to words.
; m2=fft2_m2;
mov ecx,[fft2_m2]
sal ecx,2
mov [fft2_m2],ecx
sar ecx,1
xor eax,eax
mov [J],eax
mov eax,[fft2_size]
sal eax,3
mov [JMAX],eax
; m1=fft2_m1;
mov eax,[fft2_m1]
sal eax,1
mov [M1],eax
sal eax,1
mov [fft2_m1],eax
; for(j=0; j<siz_m4; j+=m1)
; {
dlp0hi:
; itab=0;
xor edi,edi
; ia=j;
mov esi,[ZXY]
add esi,[J] ;edx = ia
dlp1hi:;
; ss1= fft2_tab[2*itab].sin;
; cs1= fft2_tab[2*itab].cos;
movq mm0,[ebp+2*edi] ;mm0 = cs1 -ss1 ss1 cs1
; x0=fft1_tmp[4*ia ];
; y0=fft1_tmp[4*ia+1];
; u0=fft1_tmp[4*ia+2];
; w0=fft1_tmp[4*ia+3];
; ia+=m1;
; x1=fft1_tmp[4*ia ];
; y1=fft1_tmp[4*ia+1];
; u1=fft1_tmp[4*ia+2];
; w1=fft1_tmp[4*ia+3];
;mm0 = c1 -s1 s1 c1
movq mm1,[esi] ;mm1 = w0 u0 y0 x0
movq mm2,[esi+ecx ] ;mm2 = w1 u1 y1 x1
; x2=zxy[ic ];
; y2=zxy[ic+1];
; u2=zxy[ic+2];
; w2=zxy[ic+3];
movq mm3,[esi+2*ecx] ;mm3 = w2 u2 y2 x2
add esi,ecx
movq mm4,mm2 ;mm4 = w1 u1 y1 x1
; t1= c1*x1+s1*y1;
; t2= c1*y1-s1*x1;
; r1= c1*u1+s1*w1;
; r2= c1*w1-s1*u1;
punpckldq mm2,mm2 ;mm2 = y1 x1 y1 x1
punpckhdq mm4,mm4 ;mm4 = w1 u1 w1 u1
pmaddwd mm2,mm0 ;mm2 = c1*y1-s1*x1 c1*x1+s1*y1
pmaddwd mm4,mm0 ;mm4 = c1*w1-s1*u1 c1*u1+s1*w1
movq mm6,mm1 ;mm6 = w0 u0 y0 x0
psrad mm2,15 ;mm2 = t2 t1
psrad mm4,15 ;mm4 = r2 r1
packssdw mm2,mm4 ;mm2 = r2 r1 t2 t1
; x3=zxy[id ];
; y3=zxy[id+1];
; u3=zxy[id+2];
; w3=zxy[id+3];
movq mm7,[esi+2*ecx] ;mm7 = w3 u3 y3 x3
; x4=x0+t1;
; y4=y0+t2;
; u4=u0+r1;
; w4=w0+r2;
;
; x6=x0-t1;
; y6=y0-t2;
; u6=u0-r1;
; w6=w0-r2;
;mm0 = c1 -s1 s1 c1
;mm1 = w0 u0 y0 x0
;mm2 = r2 r1 t2 t1
;mm3 = w2 u2 y2 x2
;mm4 = ?
;mm5 = ?
;mm6 = w0 u0 y0 x0
;mm7 = w3 u3 y3 x3
paddsw mm1,mm2 ;mm1 = w4 u4 y4 x4
psubsw mm6,mm2 ;mm6 = w6 u6 y6 x6
; t3=c1*x3+s1*y3;
; t4=c1*y3-s1*x3;
; r3=c1*u3+s1*w3;
; r4=c1*w3-s1*u3;
;mm0 = c1 -s1 s1 c1
movq mm5,mm7 ;mm5 = w3 u3 y3 x3
punpckldq mm7,mm7 ;mm7 = y3 x3 y3 x3
punpckhdq mm5,mm5 ;mm5 = w3 u3 w3 u3
pmaddwd mm7,mm0 ;mm7 = c1*y3-s1*x3 c1*x3+s1*y3
pmaddwd mm5,mm0 ;mm5 = c1*w3-s1*u3 c1*u3+s1*w3
;mm7 = t4 t3
;mm5 = r4 r3
sub esi,ecx
psrad mm7,15 ;mm7 = t4 t3
psrad mm5,15 ;mm5 = r4 r3
packssdw mm7,mm5 ;mm7 = r4 r3 t4 t3
; x5=x2+t3;
; y5=y2+t4;
; u5=u2+r3;
; w5=w2+r4;
;
; x7=x2-t3;
; y7=y2-t4;
; u7=u2-r3;
; w7=w2-r4;
;mm0 = c1 -s1 s1 c1
;mm1 = w4 u4 y4 x4
;mm2 = ?
;mm3 = w2 u2 y2 x2
;mm4 = ?
;mm5 = r4 r3
;mm6 = w6 u6 y6 x6
;mm7 = t4 t3
movq mm5,mm3 ;mm5 = w2 u2 y2 x2
paddsw mm3,mm7 ;mm3 = w5 u5 y5 x5
psubsw mm5,mm7 ;mm5 = w7 u7 y7 x7
;mm0 = c1 -s1 s1 c1
;mm1 = w4 u4 y4 x4
;mm2 = ?
;mm3 = w5 u5 y5 x5
;mm4 = ?
;mm5 = w7 u7 y7 x7
;mm6 = w6 u6 y6 x6
;mm7 = ?
movq mm0,[ebp+edi] ;mm0 = c2 -s2 s2 c2
; t5=c2*x5+s2*y5;
; t6=c2*y5-s2*x5;
; r5=c2*u5+s2*w5;
; r6=c2*w5-s2*u5;
movq mm2,mm3 ;mm2 = w5 u5 y5 x5
punpckldq mm3,mm3 ;mm3 = y5 x5 y5 x5
punpckhdq mm2,mm2 ;mm2 = w5 u5 w5 u5
pmaddwd mm3,mm0 ;mm3 = c2*y5-s2*x5 c2*x5+s2*y5
pmaddwd mm2,mm0 ;mm2 = c2*w5-s2*u5 c2*u5+s2*w5
movq mm4,mm3 ;mm3 = t6 t5
movq mm7,mm2 ;mm2 = r6 r5
psrad mm3,15 ;mm3 = t6 t5
psrad mm2,15 ;mm2 = r6 r5
packssdw mm3,mm2 ;mm3 = r6 r5 t6 t5
movq mm7,mm1 ;mm7 = w4 u4 y4 x4
paddsw mm1,mm3 ;mm1 = w4+r6 u4+r5 y4+t6 x4+t5
psubsw mm7,mm3 ;mm7 = w4-r6 u4-r5 y4-t6 x4-t5
; ia=k;
; ib=ia+m1;
; ic=ia+2*m1;
; id=ia+3*m1;
; fft1_tmp[4*ia ]=x4+t5;
; fft1_tmp[4*ia+1]=y4+t6;
; fft1_tmp[4*ia+2]=u4+r5;
; fft1_tmp[4*ia+3]=w4+r6;
; fft1_tmp[4*ic ]=x4-t5;
; fft1_tmp[4*ic+1]=y4-t6;
; fft1_tmp[4*ic+2]=u4-r5;
; fft1_tmp[4*ic+3]=w4-r6;
movq [esi],mm1
movq [esi+2*ecx],mm7
;mm0 = c1 -s1 s1 c1
;mm1 = ?
;mm2 = ?
;mm3 = ?
;mm4 = ?
;mm5 = w7 u7 y7 x7
;mm6 = w6 u6 y6 x6
;mm7 = ?
; t7=cs2*y7-ss2*x7;
; t8=cs2*x7+ss2*y7;
; r7=cs2*w7-ss2*u7;
; r8=cs2*u7+ss2*w7;
; fft1_tmp[4*ib ]=x6+t7;
; fft1_tmp[4*ib+1]=y6-t8;
; fft1_tmp[4*ib+2]=u6+r7;
; fft1_tmp[4*ib+3]=w6-r8;
;
; fft1_tmp[4*id ]=x6-t7;
; fft1_tmp[4*id+1]=y6+t8;
; fft1_tmp[4*id+2]=u6-r7;
; fft1_tmp[4*id+3]=w6+r8;
movq mm2,mm5 ;mm2 = w7 u7 y7 x7
punpckldq mm5,mm5 ;mm5 = y7 x7 y7 x7
punpckhdq mm2,mm2 ;mm2 = w7 u7 w7 u7
pmaddwd mm5,mm0 ;mm5 = c2*y7-s2*x7 c2*x7+s2*y7
pmaddwd mm2,mm0 ;mm2 = c2*w7-s2*u7 c2*u7+s2*w7
;mm5 = t7 t8
;mm2 = r7 r8
psrad mm5,15 ;mm5 = t7 t8
psrad mm2,15 ;mm2 = r7 r8
movq mm4,mm5
movq mm3,mm2
pxor mm0,mm0
punpckldq mm5,mm0 ;mm5 = t8
punpckldq mm2,mm0 ;mm2 = r8
punpckhdq mm4,mm0 ;mm4 = t7
punpckhdq mm3,mm0 ;mm3 = r7
packssdw mm4,mm3 ;mm4 = r7 t7
packssdw mm5,mm2 ;mm5 = r8 t8
psllq mm5,16 ;mm5 = r8 t8
psubsw mm4,mm5 ;mm4 = -r8 r7 -t8 t7
movq mm7,mm6 ;mm7 = w6 u6 y6 x6
paddsw mm6,mm4
psubsw mm7,mm4
add esi,ecx
movq [esi],mm6
movq [esi+2*ecx],mm7
sub esi,ecx
; itab+=inc;
; ia+=2;
; if(itab<siz_d4)goto xlp1;
; }
add edi,[INCC]
add esi,8
cmp edi,[LIMIT]
jb near dlp1hi
mov eax,[J]
add eax,[M1]
mov [J],eax
cmp eax,[JMAX]
jl near dlp0hi
emms
pop ebp
pop edi
pop esi
pop edx
pop ecx
pop ebx
ret
fft2_mmx_b1hi
push ebx
push ecx
push edx
push esi
push edi
push ebp
mov ebp,[fft2_mmxcosin]
xor eax,eax
mov [TMP1],eax
mov [TMP3],eax
dec eax
mov [TMP2],eax
movq mm7,[TMP2]
movq mm6,[TMP3]
; inc=fft2_inc
; Index of cosin table is loop control. 4 words for each entry.
mov eax,[fft2_inc]
sal eax,3
mov [INCC],eax
; fft2_inc/=4;
sar eax,5
mov [fft2_inc],eax
mov eax,[fft2_size]
sal eax,1
mov [LIMIT],eax
; Base of current transform.
;zxy=&fft2_short_int[2*ui.rx_channels*fft2_na*fft2_size];
mov eax,[fft2_size]
sal eax,2
imul eax,[fft2_na]
mov edx,[fft2_short_int]
add edx,eax
mov [ZXY],edx
; ia and related variables point to words.
; m2=fft2_m2;
mov ecx,[fft2_m2]
sal ecx,2
mov [fft2_m2],ecx
sar ecx,1
xor eax,eax
mov [J],eax
mov eax,[fft2_size]
sal eax,2
mov [JMAX],eax
; m1=fft2_m1;
mov eax,[fft2_m1]
sal eax,1
mov [M1],eax
sal eax,1
mov [fft2_m1],eax
; for(j=0; j<siz_m2; j+=m1)
; {
lp0hi:
; itab=0;
xor edi,edi
; ia=j;
mov edx,[ZXY]
add edx,[J] ;edx = ia
lp1hi:;
; ss1= fft2_tab[2*itab].sin;
; cs1= fft2_tab[2*itab].cos;
movq mm0,[ebp+2*edi] ;mm0 = cs1 -ss1 ss1 cs1
; ib=ia+m2;
; x1=zxy[ib ];
; y1=zxy[ib+1];
mov eax,[edx+ecx] ;ib
mov [TMP1],eax
mov [TMP2],eax
movq mm1,[TMP2] ;mm1 = y1 x1 y1 x1
; t1=cs1*x1+ss1*y1;
; t2=cs1*y1-ss1*x1;
pmaddwd mm1,mm0 ;mm1 = c1*y1-s1*x1 c1*x1+s1*y1
add edx,ecx
;mm1 = t2 t1
psrad mm1,15 ;mm1 = . t2 . t1
packssdw mm1,mm1 ;mm1 = t2 t1 t2 t1
pand mm1,mm7 ;mm1 = 0 0 t2 t1
; x3=zxy[id ];
; y3=zxy[id+1];
mov eax,[edx+2*ecx] ;id
mov [TMP1],eax
mov [TMP2],eax
movq mm2,[TMP2] ;mm3 = y3 x3 y3 x3
; t3=cs1*x3+ss1*y3;
; t4=cs1*y3-ss1*x3;
pmaddwd mm2,mm0 ;mm2 = c1*y3-s1*x3 c1*x3+s1*y3
sub edx,ecx
psrad mm2,15 ;mm2 = . t4 . t3
packssdw mm2,mm2 ;mm2 = t4 t3 t4 t3
pand mm2,mm6 ;mm2 = t4 t3 0 0
paddsw mm1,mm2 ;mm1 = t4 t3 t2 t1
; x0=zxy[ia ];
; y0=zxy[ia+1];
; x2=zxy[ic ];
; y2=zxy[ic+1];
mov eax,[edx] ;ia
mov [TMP2],eax
mov ebx,[edx+2*ecx] ;ic
mov [TMP1],ebx
movq mm0,[TMP2] ;mm0 = y2 x2 y0 x0
movq mm2,[TMP2]
; x4=x0+t1;
; y4=y0+t2;
; x5=x2+t3;
; y5=y2+t4;
;
; x6=x0-t1;
; y6=y0-t2;
; x7=x2-t3;
; y7=y2-t4;
paddsw mm0,mm1 ;mm0 = y5 x5 y4 x4
psubsw mm2,mm1 ;mm2 = y7 x7 y6 x6
; ss2= fft2_tab[itab].sin;
; cs2= fft2_tab[itab].cos;
movq mm1,[ebp+edi] ;mm1 = cs2 -ss2 ss2 cs2
; t5=cs2*x5+ss2*y5;
; t6=cs2*y5-ss2*x5;
movq mm3,mm0 ;mm3 = y5 x5 y4 x4
movq mm5,mm0 ;mm5 = y5 x5 y4 x4
pand mm3,mm6 ;mm3 = y5 x5 0 0
psrlq mm0,32 ;mm0 = 0 0 y5 x5
paddsw mm0,mm3 ;mm0 = y5 x5 y5 x5
pmaddwd mm0,mm1 ;mm0 = t6 t5
movq mm4,mm5
psrad mm0,15 ;mm0 = t6 t5
packssdw mm0,mm0 ;mm1 = t6 t5 t6 t5
; zxy[ia ]=x4+t5;
; zxy[ia+1]=y4+t6;
; zxy[ic ]=x4-t5;
; zxy[ic+1]=y4-t6;
paddsw mm5,mm0
psubsw mm4,mm0
movq [TMP2],mm5
movq [TMP4],mm4
mov eax,[TMP2]
mov ebx,[TMP4]
mov [edx],eax
mov [edx+2*ecx],ebx
; t8=cs2*x7+ss2*y7;
; t7=cs2*y7-ss2*x7;
movq mm5,mm2 ;mm5 = y7 x7 y6 x6
movq mm4,mm2 ;mm4 = y7 x7 y6 x6
pand mm5,mm6 ;mm5 = y7 x7 0 0
psrlq mm2,32 ;mm2 = 0 0 y7 x7
paddsw mm2,mm5 ;mm2 = y7 x7 y7 x7
pmaddwd mm2,mm1 ;mm2 = t7 t8
add edx,ecx
psrad mm2,15 ;mm2 = . t7 . t8
movq mm3,mm4 ;mm3 = y7 x7 y6 x6
movq mm1,mm2 ;mm1 = . t7 . t8
psrlq mm1,16 ;mm1 = 0 . t7 .
psrld mm1,16 ;mm1 = 0 0 0 t7
pslld mm2,16 ;mm2 = . . t8 0
psubsw mm1,mm2 ;mm1 = . . t7 -t8
; zxy[ib ]=x6+t7;
; zxy[ib+1]=y6-t8;
; zxy[id ]=x6-t7;
; zxy[id+1]=y6+t8;
paddsw mm4,mm1
psubsw mm3,mm1
movq [TMP2],mm4
movq [TMP4],mm3
mov eax,[TMP2]
mov ebx,[TMP4]
mov [edx],eax
mov [edx+2*ecx],ebx
sub edx,ecx
;
; itab+=inc;
; ia+=2;
; if(itab<siz_d4)goto xlp1;
; }
add edi,[INCC]
add edx,4
cmp edi,[LIMIT]
jb near lp1hi
mov eax,[J]
add eax,[M1]
mov [J],eax
cmp eax,[JMAX]
jl near lp0hi
emms
pop ebp
pop edi
pop esi
pop edx
pop ecx
pop ebx
ret
fft2_mmx_b2med
push ebx
push ecx
push edx
push esi
push edi
push ebp
mov ebp,[fft2_mmxcosin]
xor eax,eax
mov [TMP1],eax
mov [TMP3],eax
dec eax
mov [TMP2],eax
movq mm7,[TMP2]
movq mm6,[TMP3]
; inc=fft2_inc
; Index of cosin table is loop control. 4 words for each entry.
mov eax,[fft2_inc]
sal eax,3
mov [INCC],eax
; fft2_inc/=4;
sar eax,5
mov [fft2_inc],eax
mov eax,[fft2_size]
sal eax,1
mov [LIMIT],eax
; Base of current transform.
;zxy=&fft2_short_int[2*ui.rx_channels*fft2_na*fft2_size];
mov eax,[fft2_size]
sal eax,3
imul eax,[fft2_na]
mov edx,[fft2_short_int]
add edx,eax
mov [ZXY],edx
; ia and related variables point to words.
; m2=fft2_m2;
mov ecx,[fft2_m2]
sal ecx,2
mov [fft2_m2],ecx
sar ecx,1
xor eax,eax
mov [J],eax
mov eax,[fft2_size]
sal eax,3
mov [JMAX],eax
; m1=fft2_m1;
mov eax,[fft2_m1]
sal eax,1
mov [M1],eax
sal eax,1
mov [fft2_m1],eax
; for(j=0; j<siz_m4; j+=m1)
; {
dlp0med:
; itab=0;
xor edi,edi
; ia=j;
mov esi,[ZXY]
add esi,[J] ;edx = ia
dlp1med:;
; ss1= fft2_tab[2*itab].sin;
; cs1= fft2_tab[2*itab].cos;
movq mm0,[ebp+2*edi] ;mm0 = cs1 -ss1 ss1 cs1
; x0=fft1_tmp[4*ia ];
; y0=fft1_tmp[4*ia+1];
; u0=fft1_tmp[4*ia+2];
; w0=fft1_tmp[4*ia+3];
; ia+=m1;
; x1=fft1_tmp[4*ia ];
; y1=fft1_tmp[4*ia+1];
; u1=fft1_tmp[4*ia+2];
; w1=fft1_tmp[4*ia+3];
;mm0 = c1 -s1 s1 c1
movq mm1,[esi] ;mm1 = w0 u0 y0 x0
movq mm2,[esi+ecx ] ;mm2 = w1 u1 y1 x1
; x2=zxy[ic ];
; y2=zxy[ic+1];
; u2=zxy[ic+2];
; w2=zxy[ic+3];
movq mm3,[esi+2*ecx] ;mm3 = w2 u2 y2 x2
add esi,ecx
movq mm4,mm2 ;mm4 = w1 u1 y1 x1
; t1= c1*x1+s1*y1;
; t2= c1*y1-s1*x1;
; r1= c1*u1+s1*w1;
; r2= c1*w1-s1*u1;
punpckldq mm2,mm2 ;mm2 = y1 x1 y1 x1
punpckhdq mm4,mm4 ;mm4 = w1 u1 w1 u1
pmaddwd mm2,mm0 ;mm2 = c1*y1-s1*x1 c1*x1+s1*y1
pmaddwd mm4,mm0 ;mm4 = c1*w1-s1*u1 c1*u1+s1*w1
movq mm6,mm1 ;mm6 = w0 u0 y0 x0
psrad mm2,15 ;mm2 = t2 t1
psrad mm4,15 ;mm4 = r2 r1
packssdw mm2,mm4 ;mm2 = r2 r1 t2 t1
; x3=zxy[id ];
; y3=zxy[id+1];
; u3=zxy[id+2];
; w3=zxy[id+3];
movq mm7,[esi+2*ecx] ;mm7 = w3 u3 y3 x3
; x4=x0+t1;
; y4=y0+t2;
; u4=u0+r1;
; w4=w0+r2;
;
; x6=x0-t1;
; y6=y0-t2;
; u6=u0-r1;
; w6=w0-r2;
;mm0 = c1 -s1 s1 c1
;mm1 = w0 u0 y0 x0
;mm2 = r2 r1 t2 t1
;mm3 = w2 u2 y2 x2
;mm4 = ?
;mm5 = ?
;mm6 = w0 u0 y0 x0
;mm7 = w3 u3 y3 x3
paddsw mm1,mm2 ;mm1 = w4 u4 y4 x4
psubsw mm6,mm2 ;mm6 = w6 u6 y6 x6
; t3=c1*x3+s1*y3;
; t4=c1*y3-s1*x3;
; r3=c1*u3+s1*w3;
; r4=c1*w3-s1*u3;
;mm0 = c1 -s1 s1 c1
movq mm5,mm7 ;mm5 = w3 u3 y3 x3
punpckldq mm7,mm7 ;mm7 = y3 x3 y3 x3
punpckhdq mm5,mm5 ;mm5 = w3 u3 w3 u3
pmaddwd mm7,mm0 ;mm7 = c1*y3-s1*x3 c1*x3+s1*y3
pmaddwd mm5,mm0 ;mm5 = c1*w3-s1*u3 c1*u3+s1*w3
;mm7 = t4 t3
;mm5 = r4 r3
sub esi,ecx
psrad mm7,15 ;mm7 = t4 t3
psrad mm5,15 ;mm5 = r4 r3
packssdw mm7,mm5 ;mm7 = r4 r3 t4 t3
; x5=x2+t3;
; y5=y2+t4;
; u5=u2+r3;
; w5=w2+r4;
;
; x7=x2-t3;
; y7=y2-t4;
; u7=u2-r3;
; w7=w2-r4;
;mm0 = c1 -s1 s1 c1
;mm1 = w4 u4 y4 x4
;mm2 = ?
;mm3 = w2 u2 y2 x2
;mm4 = ?
;mm5 = r4 r3
;mm6 = w6 u6 y6 x6
;mm7 = t4 t3
movq mm5,mm3 ;mm5 = w2 u2 y2 x2
paddsw mm3,mm7 ;mm3 = w5 u5 y5 x5
psubsw mm5,mm7 ;mm5 = w7 u7 y7 x7
;mm0 = c1 -s1 s1 c1
;mm1 = w4 u4 y4 x4
;mm2 = ?
;mm3 = w5 u5 y5 x5
;mm4 = ?
;mm5 = w7 u7 y7 x7
;mm6 = w6 u6 y6 x6
;mm7 = ?
movq mm0,[ebp+edi] ;mm0 = c2 -s2 s2 c2
; t5=c2*x5+s2*y5;
; t6=c2*y5-s2*x5;
; r5=c2*u5+s2*w5;
; r6=c2*w5-s2*u5;
movq mm2,mm3 ;mm2 = w5 u5 y5 x5
punpckldq mm3,mm3 ;mm3 = y5 x5 y5 x5
punpckhdq mm2,mm2 ;mm2 = w5 u5 w5 u5
pmaddwd mm3,mm0 ;mm3 = c2*y5-s2*x5 c2*x5+s2*y5
pmaddwd mm2,mm0 ;mm2 = c2*w5-s2*u5 c2*u5+s2*w5
movq mm4,mm3 ;mm3 = t6 t5
movq mm7,mm2 ;mm2 = r6 r5
psrad mm3,16 ;mm3 = t6 t5
psrad mm2,16 ;mm2 = r6 r5
packssdw mm3,mm2 ;mm3 = r6 r5 t6 t5
psraw mm1,1
movq mm7,mm1 ;mm7 = w4 u4 y4 x4
paddsw mm1,mm3 ;mm1 = w4+r6 u4+r5 y4+t6 x4+t5
psubsw mm7,mm3 ;mm7 = w4-r6 u4-r5 y4-t6 x4-t5
; ia=k;
; ib=ia+m1;
; ic=ia+2*m1;
; id=ia+3*m1;
; fft1_tmp[4*ia ]=x4+t5;
; fft1_tmp[4*ia+1]=y4+t6;
; fft1_tmp[4*ia+2]=u4+r5;
; fft1_tmp[4*ia+3]=w4+r6;
; fft1_tmp[4*ic ]=x4-t5;
; fft1_tmp[4*ic+1]=y4-t6;
; fft1_tmp[4*ic+2]=u4-r5;
; fft1_tmp[4*ic+3]=w4-r6;
movq [esi],mm1
movq [esi+2*ecx],mm7
;mm0 = c1 -s1 s1 c1
;mm1 = ?
;mm2 = ?
;mm3 = ?
;mm4 = ?
;mm5 = w7 u7 y7 x7
;mm6 = w6 u6 y6 x6
;mm7 = ?
; t7=cs2*y7-ss2*x7;
; t8=cs2*x7+ss2*y7;
; r7=cs2*w7-ss2*u7;
; r8=cs2*u7+ss2*w7;
; fft1_tmp[4*ib ]=x6+t7;
; fft1_tmp[4*ib+1]=y6-t8;
; fft1_tmp[4*ib+2]=u6+r7;
; fft1_tmp[4*ib+3]=w6-r8;
;
; fft1_tmp[4*id ]=x6-t7;
; fft1_tmp[4*id+1]=y6+t8;
; fft1_tmp[4*id+2]=u6-r7;
; fft1_tmp[4*id+3]=w6+r8;
movq mm2,mm5 ;mm2 = w7 u7 y7 x7
punpckldq mm5,mm5 ;mm5 = y7 x7 y7 x7
punpckhdq mm2,mm2 ;mm2 = w7 u7 w7 u7
pmaddwd mm5,mm0 ;mm5 = c2*y7-s2*x7 c2*x7+s2*y7
pmaddwd mm2,mm0 ;mm2 = c2*w7-s2*u7 c2*u7+s2*w7
;mm5 = t7 t8
;mm2 = r7 r8
psrad mm5,16 ;mm5 = t7 t8
psrad mm2,16 ;mm2 = r7 r8
movq mm4,mm5
movq mm3,mm2
pxor mm0,mm0
punpckldq mm5,mm0 ;mm5 = t8
punpckldq mm2,mm0 ;mm2 = r8
punpckhdq mm4,mm0 ;mm4 = t7
punpckhdq mm3,mm0 ;mm3 = r7
packssdw mm4,mm3 ;mm4 = r7 t7
packssdw mm5,mm2 ;mm5 = r8 t8
psllq mm5,16 ;mm5 = r8 t8
psubsw mm4,mm5 ;mm4 = -r8 r7 -t8 t7
psraw mm6,1
movq mm7,mm6 ;mm7 = w6 u6 y6 x6
paddsw mm6,mm4
psubsw mm7,mm4
add esi,ecx
movq [esi],mm6
movq [esi+2*ecx],mm7
sub esi,ecx
; itab+=inc;
; ia+=2;
; if(itab<siz_d4)goto xlp1;
; }
add edi,[INCC]
add esi,8
cmp edi,[LIMIT]
jb near dlp1med
mov eax,[J]
add eax,[M1]
mov [J],eax
cmp eax,[JMAX]
jl near dlp0med
emms
pop ebp
pop edi
pop esi
pop edx
pop ecx
pop ebx
ret
fft2_mmx_b1med
push ebx
push ecx
push edx
push esi
push edi
push ebp
mov ebp,[fft2_mmxcosin]
xor eax,eax
mov [TMP1],eax
mov [TMP3],eax
dec eax
mov [TMP2],eax
movq mm7,[TMP2]
movq mm6,[TMP3]
; inc=fft2_inc
; Index of cosin table is loop control. 4 words for each entry.
mov eax,[fft2_inc]
sal eax,3
mov [INCC],eax
; fft2_inc/=4;
sar eax,5
mov [fft2_inc],eax
mov eax,[fft2_size]
sal eax,1
mov [LIMIT],eax
; Base of current transform.
;zxy=&fft2_short_int[2*ui.rx_channels*fft2_na*fft2_size];
mov eax,[fft2_size]
sal eax,2
imul eax,[fft2_na]
mov edx,[fft2_short_int]
add edx,eax
mov [ZXY],edx
; ia and related variables point to words.
; m2=fft2_m2;
mov ecx,[fft2_m2]
sal ecx,2
mov [fft2_m2],ecx
sar ecx,1
xor eax,eax
mov [J],eax
mov eax,[fft2_size]
sal eax,2
mov [JMAX],eax
; m1=fft2_m1;
mov eax,[fft2_m1]
sal eax,1
mov [M1],eax
sal eax,1
mov [fft2_m1],eax
; for(j=0; j<siz_m2; j+=m1)
; {
lp0med:
; itab=0;
xor edi,edi
; ia=j;
mov edx,[ZXY]
add edx,[J] ;edx = ia
lp1med:;
; ss1= fft2_tab[2*itab].sin;
; cs1= fft2_tab[2*itab].cos;
movq mm0,[ebp+2*edi] ;mm0 = cs1 -ss1 ss1 cs1
; ib=ia+m2;
; x1=zxy[ib ];
; y1=zxy[ib+1];
mov eax,[edx+ecx] ;ib
mov [TMP1],eax
mov [TMP2],eax
movq mm1,[TMP2] ;mm1 = y1 x1 y1 x1
; t1=cs1*x1+ss1*y1;
; t2=cs1*y1-ss1*x1;
pmaddwd mm1,mm0 ;mm1 = c1*y1-s1*x1 c1*x1+s1*y1
add edx,ecx
;mm1 = t2 t1
psrad mm1,15 ;mm1 = . t2 . t1
packssdw mm1,mm1 ;mm1 = t2 t1 t2 t1
pand mm1,mm7 ;mm1 = 0 0 t2 t1
; x3=zxy[id ];
; y3=zxy[id+1];
mov eax,[edx+2*ecx] ;id
mov [TMP1],eax
mov [TMP2],eax
movq mm2,[TMP2] ;mm3 = y3 x3 y3 x3
; t3=cs1*x3+ss1*y3;
; t4=cs1*y3-ss1*x3;
pmaddwd mm2,mm0 ;mm2 = c1*y3-s1*x3 c1*x3+s1*y3
sub edx,ecx
psrad mm2,15 ;mm2 = . t4 . t3
packssdw mm2,mm2 ;mm2 = t4 t3 t4 t3
pand mm2,mm6 ;mm2 = t4 t3 0 0
paddsw mm1,mm2 ;mm1 = t4 t3 t2 t1
; x0=zxy[ia ];
; y0=zxy[ia+1];
; x2=zxy[ic ];
; y2=zxy[ic+1];
mov eax,[edx] ;ia
mov [TMP2],eax
mov ebx,[edx+2*ecx] ;ic
mov [TMP1],ebx
movq mm0,[TMP2] ;mm0 = y2 x2 y0 x0
movq mm2,[TMP2]
; x4=x0+t1;
; y4=y0+t2;
; x5=x2+t3;
; y5=y2+t4;
;
; x6=x0-t1;
; y6=y0-t2;
; x7=x2-t3;
; y7=y2-t4;
paddsw mm0,mm1 ;mm0 = y5 x5 y4 x4
psubsw mm2,mm1 ;mm2 = y7 x7 y6 x6
; ss2= fft2_tab[itab].sin;
; cs2= fft2_tab[itab].cos;
movq mm1,[ebp+edi] ;mm1 = cs2 -ss2 ss2 cs2
; t5=cs2*x5+ss2*y5;
; t6=cs2*y5-ss2*x5;
movq mm3,mm0 ;mm3 = y5 x5 y4 x4
movq mm5,mm0 ;mm5 = y5 x5 y4 x4
pand mm3,mm6 ;mm3 = y5 x5 0 0
psrlq mm0,32 ;mm0 = 0 0 y5 x5
paddsw mm0,mm3 ;mm0 = y5 x5 y5 x5
pmaddwd mm0,mm1 ;mm0 = t6 t5
psraw mm5,1
movq mm4,mm5
psrad mm0,16 ;mm0 = t6 t5
packssdw mm0,mm0 ;mm1 = t6 t5 t6 t5
; zxy[ia ]=x4+t5;
; zxy[ia+1]=y4+t6;
; zxy[ic ]=x4-t5;
; zxy[ic+1]=y4-t6;
paddsw mm5,mm0
psubsw mm4,mm0
movq [TMP2],mm5
movq [TMP4],mm4
mov eax,[TMP2]
mov ebx,[TMP4]
mov [edx],eax
mov [edx+2*ecx],ebx
; t8=cs2*x7+ss2*y7;
; t7=cs2*y7-ss2*x7;
movq mm5,mm2 ;mm5 = y7 x7 y6 x6
movq mm4,mm2 ;mm4 = y7 x7 y6 x6
pand mm5,mm6 ;mm5 = y7 x7 0 0
psrlq mm2,32 ;mm2 = 0 0 y7 x7
paddsw mm2,mm5 ;mm2 = y7 x7 y7 x7
pmaddwd mm2,mm1 ;mm2 = t7 t8
add edx,ecx
psrad mm2,16 ;mm2 = . t7 . t8
psraw mm4,1
movq mm3,mm4 ;mm3 = y7 x7 y6 x6
movq mm1,mm2 ;mm1 = . t7 . t8
psrlq mm1,16 ;mm1 = 0 . t7 .
psrld mm1,16 ;mm1 = 0 0 0 t7
pslld mm2,16 ;mm2 = . . t8 0
psubsw mm1,mm2 ;mm1 = . . t7 -t8
; zxy[ib ]=x6+t7;
; zxy[ib+1]=y6-t8;
; zxy[id ]=x6-t7;
; zxy[id+1]=y6+t8;
paddsw mm4,mm1
psubsw mm3,mm1
movq [TMP2],mm4
movq [TMP4],mm3
mov eax,[TMP2]
mov ebx,[TMP4]
mov [edx],eax
mov [edx+2*ecx],ebx
sub edx,ecx
;
; itab+=inc;
; ia+=2;
; if(itab<siz_d4)goto xlp1;
; }
add edi,[INCC]
add edx,4
cmp edi,[LIMIT]
jb near lp1med
mov eax,[J]
add eax,[M1]
mov [J],eax
cmp eax,[JMAX]
jl near lp0med